Key term for OCR GCSE Biology A, used in Ecosystems.
The removal of metabolic waste products, such as urea and carbon dioxide, produced by chemical reactions inside cells.
Excretion appears in OCR GCSE Biology A revision content for Community level systems, especially Ecosystems and Pyramids of biomass.
Community level systems
Ecosystems • Pyramids of biomass
Community level systems
Ecosystems • Efficiency of biomass transfer
Scaling up
The challenges of size • Substances transported
Cell level systems
Photosynthesis • Photosynthetic organisms
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